Fracking protesters march on Cuadrilla drilling site in Balcombe

A City of London Police officer uses a liquid to un-glue a group of anti fracking demonstrators, as they stand with their hands super-glued to each other through a plastic pipe, and the sliding doors at the offices of Bell Pottinger in High Holborn in central London, the PR company used by energy company CuadrillaPicture: John Stillwell/PA